Chromogen

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chromogen

[′krō·mə‚jen]
(biochemistry)
A pigment precursor.
(microbiology)
A microorganism capable of producing color under suitable conditions.

Chromogen

 

according to the color theory devised by O. Witt, a substance containing chromophores—groups of atoms responsible for the coloration of various compounds. The term was also used to designate colorless substances found in animal and plant tissues that become pigments as a result of oxidation. V. I. Palladin proposed the term “respiratory chromogen” as part of his theory of plant respiration in reference to substances that become pigments through reversible oxidation. The equivalent Russian term is no longer used in the literature.

References in periodicals archive ?
is a fully automated, benchtop coagulation workstation offering a selection of 80 user-definable tests for performing clotting, chromogenic, and immunological assays in a random-access manner.
Automatic digital analysis of chromogenic media for vancomycin-resistant Enterococcus screens using Copan WASPLab.
In phenotypic ESBLs screening by chromogenic agar plate method, 79% (85 of 108) were found as ESBL positive; 42% (36 of 85) was E.
Therefore, considering the chromogenic agar ability to identify directly a target bacteria and the microdot method that reduce the material used to determine cell concentration in a sample.
Browse 74 market data Tables and 95 Figures spread through 173 Pages and in-depth TOC on "Pyrogen Testing Market by Product (Instruments, Services, Kits and Reagents), Application (Pharmaceutical & Biotechnology, Medical Devices, Other), & by Test (In Vitro, Lal, Gel Clot, Turbidimetric, Chromogenic, Rabbit) - Global Forecasts to 2021" http://www.
Alain Rambach, an inventor and pioneer since 1979 in chromogenic media technology, founded CHROMagar in 1993 to provide innovative chromogenic media solutions to improve and simplify traditional culture techniques.
What makes the new Protos 3 outperform other commercial colony counters is the system's ability to count colonies in seconds and identify microbial species by their colour on chromogenic plates.
The eight chromogenic prints are expected to sell for more than [euro]1,000 each at Bloomsbury Auctions in London on June 4.
A recent study at our institution revealed discrepancies between Becton Dickinson (BD) Phoenix penicillinase detection and a chromogenic cefinase disk method for the determination of penicillin resistance (14).
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KEYWORDS: Urine culture Chromogenic agar medium Conventional culture system Rate of isolation Presumptive identification.
Caris Molecular Intelligence uses various analytical technologies, such as immunohistochemistries, fluorescence and chromogenic in situ hybridisation, polymerase chain reaction and next-generation sequencing, to provide full and clinically relevant profile of a person's unique cancer-related biomarkers.